A Sphere Mounted on a Fixed Base That Steers the Cursor

question 22

Multiple Choice

A sphere mounted on a fixed base that steers the cursor on a computer display is known as a ________.

• A)Mouse
• B)Joystick
• C)Light pen
• D)Trackball

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Definitions:

Atonic

Lacking normal muscle tone or strength; often refers to a type of seizure or to a condition affecting bodily muscles.

Myasthenia Gravis

A chronic autoimmune disorder characterized by weakness and rapid fatigue of any of the muscles under your voluntary control, due to a breakdown in communication between nerves and muscles.

Autoimmune Disease

A disorder in which the body's immune system attacks its own tissues, mistaking them for foreign invaders.

Muscular Weakness

A reduction in the strength of one or more muscles, often resulting in an inability to exert force with one's muscles to the normal extent.